Automatically threading shuttle



March 19, 1935. I I w sT s 1,995,194

AUTOMATICALLY THREADING SHUTTLE Filed 001;. 26, 1934 Whutmmn w i I I I 1 1 J. I! 4.

W/T/VE SS, 4 iNvENToR. 5 CL/NTO/V a, C0506 MLLACEI TMFSON BYMZIM ATTORNEY.

Patented Mar. 19, 1935 PATENT OFFICE AUTOMATICALLY THREADING snu'rrr.

Wallace Stimpson, Hopedale, Mass, assignor; to Draper Corporation, Hopedale, Mass, a corporation of Maine Application October 26, 1934, Serial No. 750,181

V 4 Claims.

The present invention pertains to: automatically threading loom shuttles and more particularly to the type of such shuttles having a threadv ingscroll positioned in orextending into a lon- '5- gitudinally extendingthreadpassage; f

In shuttles of the type mentioned, it'is accepted practice to provide a horizontal thread supporting bridge across the outer end' of ,the

7 thread passage, the free end of the scroll being inwardlyof the bridge, which supports the thread above the floor of the thread passage. This bridge has been thought to be an indispensable feature of threading blocks of the type involved, for the reason that omission of the bridge permits the filling thread to escape rearwardly about the scroll if, at the beginning of the second pick after transfer, it escapes from the thread guard or horn. On the other hand, there are weaving conditions which require that the running filling extend along the floor of the thread passage and not be supported above the floor by a bridge.

I propose to provide a threading block which has a thread path extending downwardly and forwardly from the floor of the thread passage without requiring the thread to pass up over a bridge, which has a threading scroll, and which has guard means for preventing the filling thread from escaping rearwardly past the end of the scroll. To this end, the guard means is positioned in the thread passage outwardly of the point of the scroll and has a surface which inclines downwardly and forwardly from a point above and to the rear of the scroll end to a point on the floor which is forwardly of the scroll end but rearwardly of the thread path.

The preferred embodiment of the invention is illustrated on the accompanying drawing, of which:

Fig. 1 is a perspective view of the end of a shuttle containing a threading block;

Fig. 2 is a cross-sectional view of the shuttle;

Fig. 3 is an elevation of the threading block detached from the shuttle; and

Fig. 4 is a longitudinal sectional view of the threading block, taken approximately on line 44, Fig. 3.

The shuttle shown on the drawing includes a shuttle body 1 having a cavity 2 for reception of a filling carrier as bobbin 3. The shuttle body is recessed as at 4 to receive a threading block indicated generally at 5. The threading block includes a front wall 6, rear wall 7 and floor 8 defining a thread passage which extends longi- 55 tudinally of the shuttle, A horn 9 extends from the front wall outwardly and rearwardly across the thread passage infthe usual manner. It will be noted that the path for the fully threaded filling extends from the outer end of the fioor 8 downwardly and forwardly, beneath theguide 10, to the side delivery eye 11 in the front wall of the shuttleisee dotted line P, Fig. 3).

The shuttle as thus far described operates in the usual manner. That is, when a new bobbin is transferred to the shuttle the end 1 of the filling extends fromthe bobbin upwardly and outwardly of the loom to a suitable holder, not shown. Then, as the shuttle makes its first pick after transfer the filling swirls down into the thread passage and around the horn so as to extend beneath the horn as shown by Fig. 1. The filling can be most surely caused to assume its position beneath the horn if the shuttle is provided with a threading scroll. There is shown on the drawing a threading scroll .12 of the thread casting and guiding type which is well known in the art. The particular scroll shown is positioned entirely within the thread passage in the threading block and the free end 13 of the scroll terminates in the passage inwardly and rearwardly of the aforementioned path of the fully threaded filling.

When the shuttle has completed its first pick after transfer and is started on the second or return pick the filling end 1 becomes slack and may sway or twistrearwardly so as to become unthreaded from beneath the horn 9. Then, if the end can pass rearwardly beneath the free end 13 of the scroll it will become completely unthreaded and will be broken. I provide means for positively preventing the filling from escaping rearwardly of the scroll, which means does not wardly past said end to a point 16 on the floor which is just rearwardly of the thread path for the fully threaded filling. This guard surface overlaps, or extends in front of, the free end 13 of the scroll. In other words, the free end of the scroll terminates rearwardly of theguard surface whereby the latter positively prevents the filling from unthreading by rearward movement beneath the scroll.

Having fully disclosed the preferred embodiment of my invention, I claim:

1. An automatically threading loom shuttle having a side delivery eye, a threading block having front and rear walls and a floor defining a longitudinally extending thread passage, a threading scroll in said thread passage, said shuttle having a thread path extending from the outer end of said floor downwardly and forwardly to said delivery eye, and a guard having a surface which inclines downwardly and forwardly from a point above and rearwardly of the free end of said scroll to a point on the floor rear-- wardly of said path, the outer end of said scroll being free and terminating rearwardly of said surface and above said floor; r

2. An automatically threading loom shuttle having a side delivery eye, a threading block having front and rear walls and a floor defining a longitudinally extending thread passage, said shuttle having a thread path extending from the outer end of said floor downwardly and forwardly to said delivery eye, a thread casting and guiding scroll positioned entirely in said thread passage and having a free end which terminates in said passage rearwardly of said path, and a guard having a surface which inclines downwardly and forwardly from a point above and rearwardly of said end of said scroll to a point on said floor rearwardly of said path but forwardly of said end of said scroll, thereby preventing the partially threaded filling from passing rearwardly beneath the end of said scroll.

3. An automatically threading loom shuttle having a side delivery eye, a threading block having a front and rear walls and a floor defining a longitudinally extending thread passage, said shuttle having a thread path extending from the outer end of said floor downwardly and forwardly to said delivery eye; a guard comprised of a wall extending forwardly from said rear wall and having a front surface which inclines downwardly and forwardly to a point rearwardly of said thread path, and a threading scroll having a free end which terminates inwardly of said guard wall rearwardly of said inclined surface and belowthe top thereof.

4. "An automatically threading loom shuttle having a side delivery eye, a threading block having front and'rear walls and a floor defining a longitudinally extending thread passage, said shuttle having a thread path extending from the outerjjend of said floor downwardly and forwardly to'said delivery eye, a thread casting and guiding scroll positioned entirely in said thread passage and having a free end which terminates in said passage rearwardly of said pathQand a guard extendingfi'om said rear 'wall forwardly past said end of said scroll outwardly thereof and terminating rearwardly of said path.

WALLACE I. STIMIPSON. 

